A frequency-domain approach is described for estimating parameters, such as stability and control derivatives, in aircraft flight dynamic models from measured input and output data. The approach uses orthogonal phase-optimized multisines for moving the aircraft control effectors, Fourier analysis for computing multiple-input multiple-output frequency responses, and a maximum likelihood estimator called frequency response error (FRE) for determining values and uncertainties for the model parameters. The approach is demonstrated using flight test data for two subscale airplanes: the T-2 generic transport model and the X-56A aeroelastic demonstrator. Results and comparisons with the output-error method indicated that the approach produced accurate estimates of stability and control derivatives and their uncertainties from flight test data.


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    Title :

    Aircraft System Identification from Multisine Inputs and Frequency Responses


    Contributors:

    Conference:

    AIAA SciTech 2020 ; 2020 ; Orlando, FL, United States


    Publication date :

    2020-01-06


    Type of media :

    Conference paper


    Type of material :

    No indication


    Language :

    English





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